<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>重叠效果</title>
        <style>
            *{
                margin: 0;
                padding: 0;
            }
            div{
                width: 1226px;
                height: 460px;
                position: relative;
            }
            ul{
                position: absolute;
                bottom: 10px;
                right: 10px;
            }
            li{
                width: 10px;
                height: 10px;
                margin: 0 5px;
                list-style: none;
                border-radius: 50%;
                float: left;
                background: #969696;
            }
        </style>
    </head>
    <body>
        <div>
            <img src="img/bg-2.png" alt="">
            <ul>
                <li></li>
                <li></li>
                <li></li>
                <li></li>
            </ul>
        </div>
    </body>
</html>